Ryan - Burton Rep wrote an answer about Burton Custom V-Rocker Snowboard - 09/10 on November 6, 2009
Check out the sizing chart... but, for the most part, you always go by weight... are you plumpin' up for the winter? If not I would probably stay around a 154. (you could do 151 for sure)
Unless you are full big mountain / Backcountry dude, then go larger...
If you love rails, you could go smaller. (the 151)
To give you a comparison, I am 6' tall and 190lbs... I ride a 157 and like riding everything! If I ride just POWDER I do a 159 Wide.